[ckan-dev] questions on resources import / export

Mon Oct 21 09:26:28 UTC 2013

Hi Elena,

> What was you're experience with using GN? Did you have the opportunity to
> compare it with CKAN and it's geographical extension for example?

As a first point, I'd like to make it clear that I may be a little biased 
toward GN since I'm quite involved in it.

Comparing CKAN and GN on the geographic metadata capabilities is quite unfair: 

GN was born as a catalogue for geographic metadata, handling different 
standards and profiles, and has been promoted as a reference implementation of 
the OGC CSW 2.0.2 standard. It provides all the features needed for a complete 
workflow of the geo metadata, from the editing to the publication.

On the other side CKAN has been developed as a dissemination point for any 
kind of open data: as such, it deals with geo metadata only as a dissemination 
application: you can't edit iso19139 metadata in it, but only view and publish 
metadata that have been harvested from an external CSW source. 
The CSW service that CKAN offers will only publish metadata that have been 
previously harvested from somewhere else.

Pls don't let me wrong about CKAN: I'm only stressing the fact that the focus 
of the two catalogs are quite different.

> GN was also among the candidates for the geographical metadata, but some
> partners reported some issues so we're actually discarding it.

What's great about open source products is the fact you have communities to 
discuss (and solve problems) with ;)

   Cheers,
   Emanuele

PS: I guess this thread would fit better in ckan-discuss that -dev.

Alle 10:16:47 di Monday 21 October 2013, Elena Camossi ha scritto:
> Dear Emanuele,
> 
> thanks a lot for your opinion, very much appreciated.
> We're defining the architecture of our system that will encompass CSW and
> non CSW harvesting from several geographical sources, and from
> non-geographical catalogues  as well. Our Idea is to test both CKAN  and
> DKAN and their geographical extensions for our catalogue, but we are also
> interested to understand the possible interactions among the two solutions.
> GN was also among the candidates for the geographical metadata, but some
> partners reported some issues so we're actually discarding it.
> 
> What was you're experience with using GN? Did you have the opportunity to
> compare it with CKAN and it's geographical extension for example?
> 
> Kind regards,
> -Elena
> 
> > -----Original Message-----
> > From: Emanuele Tajariol [mailto:etj.mlist at gmail.com]
> > Sent: mercoledì 16 ottobre 2013 18:02
> > To: Elena Camossi
> > Cc: ckan-dev at lists.okfn.org
> > Subject: Re: [ckan-dev] questions on resources import / export
> > 
> > Hi Elena,
> > 
> > in a couple of deploy we did, we used CKAN and GeoNetwork in the same
> > node.
> > CKAN is used as user frontend, and publishes both geo and non-geo
> > datasets.
> > GeoNetwork is used for CSW access.
> > CKAN harvests the geographic metadata from GN using CSW, while the non-
> > geo dataset are edited directly on CKAN. Geographic metadata are of
> > course edited on GeoNetwork.
> > 
> > If you have different catalogues that should interact, it's usually a
> > good
> 
> idea
> 
> > to use existing standards (CSW for geographic datasets, for instance).
> > Using internal formats (such as querying Solr) may be more efficient, but
> > then you would be tied to a specific version of the application and its
> 
> internal
> 
> > model; some more work would be needed every time internal formats
> > change.
> > Just my 2¢ :)
> > 
> >    Cheers,
> >    Emanuele
> > 
> > Alle 16:03:03 di Tuesday 15 October 2013, Elena Camossi ha scritto:
> > > Dear all,
> > > 
> > > I'm a newbie to CKAN and I'm trying to understand how to define a
> > > possible architecture for a platform for data sharing we're going to
> 
> develop.
> 
> > > Both geographical and traditional (non-geographical) resources will be
> > > included, and these will be harvested from different providers.
> > > 
> > > For what concern the consumption of resources by other internal
> > > catalogue platforms (different from CKAN, e.g., DKAN, GeoNetwork),
> > > what can be the most EFFICIENT solution?
> > > Exposing CKAN (for non-geographical) and CSW (for geographical
> > > resource) services and let these other catalogues harvest the resources
> > 
> > from CKAN?
> > 
> > > Is it possible to make another catalogue interact with the CKAN
> > > instance directly at Solr level, avoiding the catalogue services? Or
> > > is it necessary to pass through the Datastore API?
> > > 
> > > I hope this is not too confusing...
> > > Thanks a lot for any suggestion.
> > > Regards,
> > > -Elena
> > 
> > --

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